So, I just got a new pioneer stereo and it says it is 50 watts x 4. The infinity amp is 180 watts total according to wjjeeps.com. I assume that would make it 45 watts x 4. Should I continue to use the amp or should I just wire the speakers directly to the new head unit?

So, I just got a new pioneer stereo and it says it is 50 watts x 4. The infinity amp is 180 watts total according to wjjeeps.com. I assume that would make it 45 watts x 4. Should I continue to use the amp or should I just wire the speakers directly to the new head unit?